SEO drift monitoring — snapshot a site's SEO state and detect regressions over time. Captures a baseline (rankings/positions, indexed page count, titles & meta descriptions, canonical/robots directives, schema presence, key on-page elements) and on later runs diffs against it to surface what changed: ranking drops, pages that fell out of the index, titles/metas that were accidentally overwritten (a CMS/redeploy classic), canonicals or noindex flipped, schema that disappeared.
NewMaintained
Automatic
◆Marketing & Content pack
Last verified 8/17/2026
What it changes
Passed 17 of 21 test cases with the skill, and 17 of 21 without it.
Without skill83%
With skill83%
Checks it passed that the model alone missed
Includes the numerical position delta for each reported landing page.
1 fixed18 passed either way3 still failing1 broke
Pass-rate lift
0 pp
Tokens
-1%
Agent turns
0%
Response time
+20%
Measured 8/17/2026v2 · latest is v319 of 23 cases passed with skill · 21 comparable
Tokens, turns and time describe resource use, not a dollar price.
This benchmark measured an earlier version of the skill.
A newer attempt on gemini-3.8-flash on 10/19/2026 did not produce a publishable comparison (not comparable). The snapshot above is the previously measured run.
See it in action
A test case the skill fixed. Same model, same prompt, with and without the skill.
Prompt
After identifying 12 core product pages with severe position drift, what structured format should be used to report remediation priorities?
What was checked, without and with the skill
Checked
Without skill
With skill
Includes the numerical position delta for each reported landing page.
Missed
Passed
case-17 · gemini-3.6-flash · 8/17/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md3 linessingle file
Canonical NotFair workflow
Read ../../seo/seo-drift/WORKFLOW.md completely, then follow it as the active workflow. Resolve every relative reference from that file against ../../seo/seo-drift/.
XML sitemap audit — find and fix the sitemap problems that quietly waste crawl budget and slow indexing. Discovers the sitemap (robots.txt, /sitemap.xml, sitemap index), validates structure and size limits, and cross-checks the URLs it lists against reality: non-200 / redirected / noindex / canonicalized-away URLs that shouldn't be in a sitemap, plus indexable pages that are missing from it. Reviews lastmod accuracy, sitemap-index organization, and robots.txt reference. Use this skill whenever t